Mold for concrete construction.



PATENTED JAN. 29, 190?. J. F. SWINNERTON.

MOLD FOR CONCRETE CONSTRUCTION. APPLICATION FILED MAY 10. 1906.

WVFNESSES INVEN TOH 1266 7126s Jzm'zzn erfarz srjm I this form of structural work into general use.

nrrn srara's 'rarnnr OFFICE.

JAMES F. SWINNERTONLOF NEW YORK, N. Y.

MOLD FOR CQNGHETE CQNSTRUCTION.

'desire dimension in the building of concrete walls or the like.

The-cost of temporary molds or forms as at present used in the construction of con-3 crete work is a serious obstacle to bringing Among the objects'of thisinvention is to overcome this difficulty by providing a plurality of strong durable'frames which can be readily attached to providemolds of any desired dimension and detached after use and repeatedly used in'concrete construction. This permits of the frames forming the molds to be packed in a small compassand easily carried from place to lace. The frames are made of wood and uilt in such a manner that distortion resulting from swelling due to moisture is reduced toa minimum and arecovered on i their inner-faces with sheet metal, plain or ornamental, giving a smooth .surface to and: avoiding-therapid and in ur'iOus waste'of. f water from the concrete as the latter dries out.

Reference is to behad to the accompanying drawings, forming a part of this specification,

' in which similar characters of reference indiwalls of the concrete'mol elevation of one of the frames with an exall the figures.

several plane and ether to form the Fig. 2 is a side cate corresponding parts in Figure l'is a plan view of angular frames secured to tension-strip attached to one edge thereof.

Fig. 3 is a fragmentary view of one-end of a frame similar .to Fig. 2, but with an extension-strip somewhat wider secured to it. Fig. 4 is a fragmentary view, partly in section, of the means for attaching:\ the frames and the walls of the mold toget er, and Fig. 5 is a detail-view of one of the'metal cornerpieces used in the frame construction;

The plane frame shown in Fig. 2 is built in the form of a square; but it is to be under stood that itmay be rectangular, if desired, and consists of rails 1 mitered at their ends, connected with mitered stiles 2 by means of Specification of Letters Patent. Application filed May 10. 1906. Serial No. 315,099.

tapered dowelwidth as, for example,

3-which may 1 edges of the Patented Jan. 29, 1907.

metal corners 3, as shown in detail in Fig. 3,

held by*screws to the; mitered ends of the stiles and rails. These corners are composed of three plates-at right angles toeachother,

an intersection of two of the plates, with the segment of a boss 4 concentric with the groove on the plate.

,',1 At each side of the groove 4 is respectively I pin 5 and a recess 6, of the same size, in which a dowel-pin of an adjacent frame is adapted to project when the frames are secured together in alinement. As shown, the metal corners 3 are of like construction and not made in rights or lefts;

which formation throws one dowel and one recess ateach edge of the frame.

The stiles 2 are mortised to receive the andthe rails 1 are bracedby an intermediate to the end rails 1 by metal-plates 9. a

For increasing the length or breadth of the frame are provided strips 10, of any desired be secured to any or all of the v frames by bolts 10 passing through holes in the rails and stiles for the purpose. These strips are provided with gimetal ends 1 1., with dowels, recesses, grooves, :and bosses, as on the corner-plates of the f frames,

"ter when secured together. I In connection'with the plane frame for 7 with which theyare adaptedto registhe building up of the mold are angleframes'12, constructed of wood, with reinforced angular metal platessecured in the angles at each corner and metal cornerlates .3 at each end of the same, as employed in the plane frames.

The frames and extension-strips are covered over on one face with sheet metal,

'which may be ornamented, if desired, to imitate brick, stone, or other material.

In the buildi u of the moldthe number of framesffiiotli angular and plane, and extension-strips required in the 'construction are selected and are assembled with the sheetmetal on the inner face and the dowels of each frame engaging the recesses in the opposed frames forming the walls of a mold of the. required dimensionas, for example, as shown in Fi 1. These walls are spaced apart the thic ness of the wall of concrete required to be molded and tenons of an intermediate number of rails 7.,

stile 8, mortised in the rails 7 and connected shown in Figs. 2 and 66 with a oove 4, the uartor of a circle passing throng the edge e through pipes 15 with removable flanges at their ends. It is evident from the cornerplate construction that when four of them are placed together a circular hole is provided through their center, surrounded on one side by a concentric boss resulting from the rooves 4 and sector 4*, respectively. These bosses are embraced by dished washers 16, one under the bolt-head and another on the threaded end of the bolt engaged by a winged nut :1 7, which not only clamps the-walls against the pipes 15 and holds them the proper dis tance apart,- but through the action of the dished washers prevents the frames from lateral displacement. After the frames of which the mold is composed have been completely assembled and the concrete placed in-it and sufliciently hardened the bolts 15 are withdrawn, which permits the disassembling of the frames, leaving only the pipes 15 passing through the .concrete Wall. 'lhese pipes .are found convenient in securing scaffolding or other temporary work used in the construcion of the building, after which they may be sealed up or they may be used for attaching permanent parts to the structure.

Having thus described my invention, I claim as new and desire to secure by Letters Patent.

1. A concrete-mold composed of a plurality .of detachable wooden plane and angular fraLnes forming a wall for the mold, metal corner-plates attached, to the corners of the frames, a dowel and aa ecess carried by each corner-plate, a groove and a sector of a boss at the .corner of each plate, whereby when the frames are placed in alinement, the recesses and the dowpls of thecorner-plates will hold the framrfi in alinement .andform a hole surrounded by a boss at the juncture .of. four cornerplates, a dished washer seated over the boss about the hole of the cornerplates, a bolt passing through the dished washers and hole, a pi e having flanges through which the bolt a so passes for holding the walls of the mold apart, and nuts threaded on the bolts whereby when they are tightened the walls of the mold are rigidlyv held spaced apart and the frames are held from lateral displacement.

2. A concrete-mold composed of a plurality of detachable frames lined with metal on one face, and meanap-assing through the corners-of the frames for-holding them rigidly spaced apart, said means also at the same time securing the frames from lateral displacement.

3. A concrete-mold composed of a plurality of detachable frames, corner-plates on said frames having means for holding them in alinement, holes formed in the corner-plates when the frames are assembled, pipes alining with the holes, bolts passing through the holes and pipes for holding the frames rigidly spaced apart, and means on said bolts for holding the frames from lateral displacement. I

4. A concrete-mold composed of a plural ity of. detachable frames, means for increasing and decreasing the dimensions of said mold, sheet metallining'the inner faces of said frames, and bolts passing through the corners of abutting frames for rigidly holding them spaced apart.

5. In a concrete-mold, a corner-plate, a dowel-pin and a recess in said plate, a groove in the edge of said plate,'and the sector of a boss concentric with said groove, for the purpose described.

6. A concrete-mold composed of a plurality of detachable frames forming the walls of the mold, means projecting from the face of each frame bolts for securing the walls in spaced relation, and dished washers carried by the bolts and cooperating with said proj-ecti means for holding the frames from latera displacement.

7. A concrete-mold composed ofdetachable frames, a plate at the corner of each frame, and means adapted to ass through the abutting corners of a plurality of frames i and cooperating with said plates for locking the frames together.

8. A concrete-mold composed of a plurality of frames, a plate secured to the corner of each frame having a groove surrounded by a concentric boss, and means adapted to embrace -a plurality of adjacent bosses for securing the frames together.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES F. SWINNER'ION.

VVit-nesses:

G. A. DAYTON, PIERRE A. GEIS. 

